package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import com.sun.xml.internal.messaging.saaj.packaging.mime.util.BEncoderStream;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
//分页查询
    @Override
    public Page<SetmealDto> pageByName(int page, int pageSize, String name) {
        Page<SetmealDto> pageInfo = new Page<>(page, pageSize);
        setmealMapper.pageByName(pageInfo, name);
        return pageInfo;
    }
    /**
     * 删除套餐，同时需要删除套餐和菜品的关联数据
     * @param ids
     */
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        //查询套餐状态，确定是否可用删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);
        int count = this.count(queryWrapper);
        if(count>0){
            //如果不能删除，抛出一个业务异常
            throw new CustomException("套餐正在起售中,不能删除");
        }
        //如果可以删除，先删除套餐表中的数据---setmeal
        this.removeByIds(ids);

        //delete from setmeal_dish where setmeal_id in (1,2,3)
        LambdaQueryWrapper<SetmealDish> wrapper = new LambdaQueryWrapper<>();
        wrapper.in(SetmealDish::getSetmealId,ids);
        //删除关系表中的数据----setmeal_dish
        setmealDishService.remove(wrapper);


    }
//根据id查询菜品信息和对应的分类信息,修改套餐进行数据回显
    @Override
    public SetmealDto getByIdWithDish(Long id) {
//        查询套餐基本信息，从setmeal表中查询
        Setmeal setmeal= this.getById(id);
        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);

//        查询当前套餐对应的菜品信息，从setmeal_dish表中查询
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmeal.getId());
        List<SetmealDish> setmealDishes = setmealDishService.list(queryWrapper);
        setmealDto.setSetmealDishes(setmealDishes);
        return setmealDto;
    }
    @Override
    @Transactional
    public void updateWithDish(SetmealDto setmealDto) {
//       修改除菜品外的其他基本信息
        this.updateById(setmealDto);
//       修改当前套餐对应的菜品数据，先删除原来的菜品信息，再添加新的菜品信息
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(queryWrapper);

//        添加当前提交过来的菜品数据
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes=setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);
    }
//套餐的起售和停售
    @Override
    public void updateStatus(Integer status, List<Long> ids) {
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids!=null,Setmeal::getId,ids);
        List<Setmeal> list = this.list(queryWrapper);
        for (Setmeal setmeal : list) {
            setmeal.setStatus(status);
            this.updateById(setmeal);
        }


    }

    @Autowired
   private SetmealDishService setmealDishService;
    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDto
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
//保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)-> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        //        保存套餐和菜品的关联信息，操作setmeal_dish,执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }
}
